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@gestita tstrs @anni @Hita IMPROVEMENT INV SELF-LUBRIGATING'BOLSTER ANDSTEP I'GR SPINNING-FRAMES.

dige stimule moet tu in there itam @anni :mt mating pnt nf its time. v

T0 ALL WHOM IT MAY GONOERN:

Be it known that I, BARTON H. JENKS, of Bridcsbulg, in the county ofPhiladelphia, and State of Pennsylvania, have invented an improvement inthe construction of Bolsters and Steps for the Spindles of Spinning-Frames; and I do hereby declare that the following is a full, clear, andexact description thereof, reference being had to the accompanyingdrawings, making a part of this specification, in which- Figure I is atop view of one of the improved holsters. i

Figure 2 is a vertical central section through the same.

, Figures 3. and l are modifications of the bolster shown in figs. 1 and2L Figure 5 is a vertical central section of a spindle step.

.Similar letters of reference indicate corresponding parts in theseveral figures..

rIhis invention relates Ato an improvement in the construction of theupper bearings', o1" holsters, and the lower bearings, or steps, for thespindles of spinningframes;l the object of which improvement' is torender such bearings cheaper, more durable, and more readily repaired,when worn away to a certain extent, than bear ings hitherto made forthis purpose; and also to provide for keeping the spindles welllubricated without requiring frequent renewal of the oil. f

The nature of my invention consists- I. In constructing the hard metalholsters or upper hearings of the spindles of spinning-frames withseparated removable soft metal bearings, and with an oil-chamber betweenthese bearings. The oil-chamber in thebolster is enclosed, and is formedby inserting short bushings of Babbitt or other durable bearing metalinto the bore of the hard-metal bolster at each end.

7. It consists in constructing the steps of said spindles with two ormore separated bearing surfaces, and with an oil-chamber between suchbearing surfaces. The oil-chamber is formed by casting the step with acon,h tracted throat, and with an opening in its bottom, and introducinga short socketed block of Babbitt or other durable bearing metal intothe step from below, all as hereinafter described.

3. It also consists in the combination of a step which is disconnectedfrom the bolster, and has an upper and lower removable bearing, with abolster which has an upper and lower bearing, and with the spindle of aspinning-frame, all in such manner that the spindle is kept steady,oiled eifectually, and the necessity of making the` step proper with aremovable cap is obviated.

To enable others skilled in the art to understand my invention, I willdescribeits construction and operation.

In the accompanying drawings, gs. I and 2, A represents a portion of thespindle-frameV and B aportion of a spindle passing through a bolster orupper bearing, which is supported by said frame. This bolster consistsof a cylindrical stem, a, terminating at its upper end in an enlargedcup, which forms an oil-receptacle, and also a shoulder for sustainingthe bolster upon the frame A. The exterior form of the holstersresembles those which have been used before my invention. Thesebolster-shells I make of cast metal, or of wrought metal turned in theproper form, and make the holes through their stems a considerablylarger in diameter than the diameter ofthe spindles for which theholsters are to be used. I then introduce into the ends of the stemstubes e e', 'made of a much smoother metal or material than that ofwhich the shells are formed; brass, Babbitt metahY or other suitablemetal or alloy may be used for this purpose. 'The two tubes, c c, leavean annular chamber, e, within the bolster, for containing apieceoficloth or other suitable substance which will absorb oil and lubricatethe spindle. The upper end of the tube c projects above the upper end ofthe bore of the stem a, and forms, in conjunction with the annular langeor cup a chamber which surrounds the spindle and receives oil for oilingit above the chamber/e. The notch f, through the upper end of tube c',allows the oil to dow to the spindle. The tubular lining or bushing maybe secured in place in the bolster in any suitable manner which willadmit of its removal when too much worn, and the insertion of a newlining. By leaving a chamber, e,.

within the stem of the bolster, I not only obtain a receptacle for oiland' a piece of cloth, which I have indicated by red lines, but I alsodiminish the friction surface upon the spindle, and cause the spindle torun with more freedom and with less expenditure of driving power thanwould be the case if 'a continuous bearing 'was used, as shown iii g. 3.The chamber e will keep the lower end of the bolster supplied with oil,and keep the bolster comparatively cool when driven at a very highdegree of speed. The chamber or cup, b, with its oil, will keep theupper end of the bolster lubricated and cool. To prevent a too rapidescape and consumption of oil, I insert into the chambers pieces ofcloth, which will allow the spindle to take the required quantity of oiland prevent waste. In fig. 3 I have represented a bolster which is linedinside with a smooth or soft metal or other substance,

to prevent rapid wear -of the spindle and to lessen friction, and'toadmit of the renewal of the lining whennecessary, but which has nointerior oil-chamber, In iig. 4 I have vrepresented a bolster which isconstructed with an interior oil-chamber, e," but which is not lined.This bolster is made of one piece'of metal, and has no soft metallining. In iig. 5 I have represented a step for the lower end of aspindle, which consists of an outer shell, y, into the lower end. ofwhich is inserted the step-block h, so as to form above it a chamber forthe reception of oil and a cloth packingA The step his m-ade ofhrass' orother metal which will he less wearing in its effect upon the spindlethan the metal of whichthe shell g is formed, and it may he removed whendesired and a new block inserted in its stead. The upper end of theshell g is cupped andfcontracted around the spindle, as at m, so as toclose the top of the oil-chamber when the spindle is seated upon theblock h, and thus keep out dust and also aiordan upper or second bearingin the step proper. Within the oil-chamber in the shell g, a piece ofcloth is put which will absorb most of the oil and supply it to thespindle in the required quantities.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. The hardmetal bolster a, with .oil-chamber e, and separated removablehearings e c', substantially in the manner and for the purposedescribed. 4 v

2. The spindle step g a m, constructed in the manner and for the purposedescribed. l

3L The combination of the bolster a c c e, step g 71, m, and spindle B,substantially-in the manner and for the purpose described,

' BARTON H. JENKS.

Witnesses: v WILLIAM' DoBsoN, JAMES HUGHES.

